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A method for accurate temperature detection based on surface-enhanced Raman scattering effect

A technology of surface-enhanced Raman and scattering effects, applied in thermometers, thermometers with physical/chemical changes, measuring heat, etc., can solve problems such as complex structures and manufacturing costs, hindering wide application

Active Publication Date: 2021-12-24
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These integrated circuit-based temperature sensors have high temperature sensitivity and flexibility, but complex structures and fabrication costs hinder their widespread application

Method used

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  • A method for accurate temperature detection based on surface-enhanced Raman scattering effect
  • A method for accurate temperature detection based on surface-enhanced Raman scattering effect
  • A method for accurate temperature detection based on surface-enhanced Raman scattering effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Firstly, put the used glassware (100 ml two-necked flask and Petri dish) into newly prepared aqua regia and saturated sodium hydroxide solution respectively, soak for 4 hours and 12 hours, wash with ultrapure water, and dry for later use.

[0039] (1) Configure the required raw materials

[0040] ① Use ultrapure water to prepare the required raw materials chloroauric acid and sodium citrate into solutions with a mass percentage concentration of 1%.

[0041] ② Use the organic solvent toluene to prepare oleylamine into an amine-containing organic solution with a molar concentration of 0.001 mol / liter.

[0042] (2) Add 48 milliliters of ultrapure water into the two-necked flask, and after heating to boiling under stirring, 0.5 milliliters of chloroauric acid solution and 1.5 milliliters of sodium citrate solution are rapidly added into boiling water successively. Keep boiling, heat and reflux for 30 minutes, and cool to room temperature to obtain a water-soluble monodispe...

Embodiment 2

[0062] The difference between this embodiment and embodiment 1 is:

[0063] (1) Configure the required raw materials

[0064] ① Use ultrapure water to prepare the required raw materials silver nitrate and sodium citrate into solutions with a mass percentage concentration of 1%.

[0065] ② Use toluene to prepare dodecylamine into an amine-containing organic solution with a molar concentration of 0.01 mol / liter.

[0066] According to steps (2), (3), (4) and (5), a hard substrate or a flexible substrate loaded with a silver nanoparticle monolayer film is obtained.

[0067] (6) Preparation of temperature sensor

[0068] Fully submerge single-layer film rigid substrates or single-layer film flexible substrates in a 10- -4 moles per liter of methylene blue solution.

[0069] (7) The excitation wavelength used is 532 nm, and the laser power is 4.25 microwatts.

[0070] (8) The excitation wavelength used is 532 nanometers, and the laser power is 4.25 microwatts.

Embodiment 3

[0072] The difference between this embodiment and embodiment 1 is:

[0073] (1) Configure the required raw materials

[0074] ① Use ultrapure water to prepare the required raw materials copper nitrate and sodium ascorbate respectively into solutions with a concentration of 1% by mass.

[0075] ② Use toluene to prepare tetradecylamine into an amine-containing organic solution with a molar concentration of 0.0001 mol / liter.

[0076] According to steps (2), (3), (4) and (5), a hard substrate or a flexible substrate loaded with a copper nanoparticle monolayer film is obtained.

[0077] (6) Preparation of temperature sensor

[0078] Fully submerge single-layer film rigid substrates or single-layer film flexible substrates in a 10- -5 moles per liter of rhodamine 6G solution.

[0079] (7) The excitation wavelength used is 785 nm, and the laser power is 500 microwatts.

[0080] (8) The excitation wavelength used is 785 nm, and the laser power is 500 microwatts.

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Abstract

A method for accurately detecting temperature based on surface-enhanced Raman scattering effect, comprising the following steps: (1) loading a plasmonic nanoparticle monolayer film on a support substrate; (2) soaking the monolayer film substrate in a probe In the molecular solution, it is dried to make a hard substrate temperature sensor or a flexible substrate temperature sensor; (3) The hard substrate temperature sensor or flexible substrate temperature sensor is placed under a gradient working temperature to collect the Raman spectrum of its surface, and the characteristic temperature is established. and the standard curve between the corresponding characteristic peak intensity; (4) place the hard substrate temperature sensor or flexible substrate temperature sensor in the detection range, collect the Raman spectrum of its surface, read the characteristic peak intensity and the temperature The standard curve comparison of the interval can realize the detection of unknown ambient temperature. The invention is simple to operate, and can realize reproducible, high-stability and high-precision temperature detection based on the temperature-dependent SERS effect of the plasmonic nanoparticle monolayer film.

Description

technical field [0001] The invention relates to a method for temperature detection. The method is a temperature sensor prepared based on surface-enhanced Raman scattering effect, and belongs to the technical field of temperature detection. Background technique [0002] Surface-enhanced Raman scattering (Surface-enhanced Raman Scattering, SERS) spectroscopy has the characteristics of fast, sensitive, non-destructive and in-situ "chemical fingerprint" identification of substances, and is widely used in temperature sensing, biological and medical detection, chemical quantitative analysis and food safety. Inspection and other fields have many applications. However, the quantitative detection and application based on SERS is still a huge challenge. The main reason is that the quality of the SERS substrate is not good, and the uniformity and reproducibility of the SERS signal cannot be guaranteed. [0003] CN108526487B discloses "a preparation method of a macro-sized close-packed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/324
Inventor 夏海兵夏侯玉娇陶绪堂
Owner SHANDONG UNIV
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